Torsional Shear Tests on Laminated Veneer Lumber Using a Universal-Type Test Machine

Yang, Zhuo; Clouston, Peggi L.; Schreyer, Alexander C.

doi:10.1061/(asce)mt.1943-5533.0000752

Cited by 3 publications

(2 citation statements)

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“…The deformation rate was 0.11 rad per meter of length per minute (rad/m/min), producing maximum torque in approximately 10 min. The test setup and test protocol for this lesser known approach have been presented in Yang et al [17] and readers are directed to this study for more detailed information on the test procedure.…”

Section: Test Methodsmentioning

confidence: 99%

“…Interestingly, from previous studies that did torsional testing of structural composite lumber [12,13,15], it appears that a correlation between size and shear strength may exist, though not scientifically proven. Moreover, the torsional shear strength of 1.9E Eastern Species LVL is not reported in the literature-with the exception of a technical note focused on the machine test setup that extends from the first author's graduate thesis [16,17]. The aim of this paper is, therefore, to establish the torsional shear strength of 1.9E Eastern Species LVL, and to investigate potential dependence of the torsional shear strength on member size.…”

Section: Introductionmentioning

confidence: 99%

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Torsional Shear Strength and Size Effect in Laminated Veneer Lumber

Yang

Clouston

Arwade

2014

Adv. Civ. Eng. Matls.

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This study investigates the effect that specimen depth has on the torsional shear strength of full-size Eastern Species Laminated Veneer Lumber (LVL). Characterization of this effect is valuable for structural design purposes as well as for use in constitutive modeling when predicting member strength of one depth based on member strength of a different depth derived from testing. To this end, torsion tests were carried out on three depths (140, 184, and 235 mm) of 1.98 m long by 44 mm thick 1.9E Eastern Species LVL. The shear strength of each depth was determined based on homogeneous, orthotropic theory for beams of rectangular cross-section. Despite a perceptible trend of slightly decreasing shear strength with increasing depth, an analysis of variance test indicated that no statistically significant depth effect exists as it relates to torsional shear strength. Further, a three dimensional finite element model of the 44 mm by 140 mm specimen indicated that stresses are uniform within the shear span of 2 times the depth plus the grip distance away from each end of the specimen. The predicted average maximum shear stress in this region compared well to the maximum shear stresses obtained experimentally.

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Section: Test Methodsmentioning

confidence: 99%